Transmission service?

[supercub]

I have about 13,000 miles on my transmission now. I had the spin on filter changed around 5,000 miles. It's my understanding the next service is at 50,000 miles..........is this true?? I don't do anything to the transmission till I reach 50,000 miles??
Brian

[supercub]

I have about 13,000 miles on my transmission now. I had the spin on filter changed around 5,000 miles. It's my understanding the next service is at 50,000 miles..........is this true?? I don't do anything to the transmission till I reach 50,000 miles??
Brian

[DriVer]

Beginning in the 2006 Model Year the GM 4L80-E/GM 4L85-E transmissions are filled with
Dexron® VI ATF (Automatic Transmission Fluid). Previous model years utilized Dexron® III
ATF. Dexron® VI ATF is fully compatible with the previous Dexron® III ATF and may be
used to top of older chassis equipped with Hydra-Matic transmissions. The recommended
interval for changing the fluid and filter is every 50,000 miles, Workhorse filter kit part no.
24210956. The AllisonTM transmissions were filled with Dexron® III ATF until April 5, 2005.

Beginning April 6, 2005 the fluid in all AllisonTM transmissions changed to TranSyndTM ATF.
Regardless on fluid type, AllisonTM recommends replacing the spin on filter only (fluid change
is not required) after the first 5,000 miles of operation, AllisonTM/Workhorse part no.
29539579. The AllisonTM recommended service interval with Dexron® III is to change the
fluid and spin-on filter is every 25,000 miles or 12 months, whichever comes first. AllisonTM
transmissions with the synthetic fluid ATF TranSyndTM have a service interval of 4 years or
100,000 miles, whichever comes first.